To provide a highly water-absorbing composite yarn having water absorption higher than that of a conventional product.

The composite yarn is produced by doubling five or less PET/ nylon disintegrated yarns, false-twisted yarns of polyester filaments, or fiber yarns of natural fibers with one core yarn of a polyester false twisted yarn by twisting, and further doubling a PET fixed yarn with the resultant doubled yarns. The composite yarn is most suitably utilized for wearing articles such as a bathrobe, everyday goods such as a bath towel and a hair towel, and other cleaving goods because the composite yarn provides properties such as the high water absorption to the original thread and a material in a woven or knitted fabric state.